The latest tech for CBTC uses UWB for train positioning, which has a precision of a few inches.
These pictures show level boarding (minimal vertical gap), they just have horizontal gaps. To the extent that there are some small vertical gaps, that is intrinsic to wheels, which change radius over time as the wheel…
Every NYC subway station has had level boarding forever since they were originally built. There can be some horizontal gaps for sure, which they should fix, but it's generally vertically level within the change in…
The article counts all the off peak and overnight trains, including shuttles. Even out of all of that, only the Franklin Shuttle is 2 cars and will soon be switching to 3 cars.
Only the Franklin Shuttle has 2-car trains, and it'll soon be switched to 3 cars since they're replacing the 75 ft cars with 60 ft cars.
Labor is by far the largest share of transit operating costs.
They already do this on lines with upgraded CBTC signaling. The train runs in ATO (Automatic Train Operation) in which the driver just pushes the start button at each station. So they tried to combine the driver and…
There are other real estate grabs through-running could support. Through-running plans often include a Sunnyside Yards station where Metro-North Penn Station Access (PSA) trains from Hell Gate meet LIRR trains to Penn…
NJT is indeed quite awful with OTP (83%[^1]), train cancellations[^2], reliability[^3], and transparency. However, through-running is also an opportunity for this to improve because, while bad in many ways as well, the…
The line at Moynihan has appreciably slowed down Amtrak boarding. Pre-Moynihan, Amtrak boarding at Penn was faster.
An extra minute or two can mean a $17 billion expansion, so it matters.
I don't think we do either of those errors. Obviously if the C caller does weird stuff, all bets are off, but we don't mutate through `&T`s or not initialize memory. `MaybeUninit` is only used in a few isolated and…
This is already done in most places, like browsers. But they want to remove the sandbox for performance reasons.
The latest tech for CBTC uses UWB for train positioning, which has a precision of a few inches.
These pictures show level boarding (minimal vertical gap), they just have horizontal gaps. To the extent that there are some small vertical gaps, that is intrinsic to wheels, which change radius over time as the wheel…
Every NYC subway station has had level boarding forever since they were originally built. There can be some horizontal gaps for sure, which they should fix, but it's generally vertically level within the change in…
The article counts all the off peak and overnight trains, including shuttles. Even out of all of that, only the Franklin Shuttle is 2 cars and will soon be switching to 3 cars.
Only the Franklin Shuttle has 2-car trains, and it'll soon be switched to 3 cars since they're replacing the 75 ft cars with 60 ft cars.
Labor is by far the largest share of transit operating costs.
They already do this on lines with upgraded CBTC signaling. The train runs in ATO (Automatic Train Operation) in which the driver just pushes the start button at each station. So they tried to combine the driver and…
There are other real estate grabs through-running could support. Through-running plans often include a Sunnyside Yards station where Metro-North Penn Station Access (PSA) trains from Hell Gate meet LIRR trains to Penn…
NJT is indeed quite awful with OTP (83%[^1]), train cancellations[^2], reliability[^3], and transparency. However, through-running is also an opportunity for this to improve because, while bad in many ways as well, the…
The line at Moynihan has appreciably slowed down Amtrak boarding. Pre-Moynihan, Amtrak boarding at Penn was faster.
An extra minute or two can mean a $17 billion expansion, so it matters.
I don't think we do either of those errors. Obviously if the C caller does weird stuff, all bets are off, but we don't mutate through `&T`s or not initialize memory. `MaybeUninit` is only used in a few isolated and…
This is already done in most places, like browsers. But they want to remove the sandbox for performance reasons.